{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T14:06:16Z","timestamp":1791209176148,"version":"4.1.0"},"reference-count":14,"publisher":"IWA Publishing","issue":"4","content-domain":{"domain":["iwaponline.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2015,8,1]]},"abstract":"<jats:p>Waste biomass from the industrial production of the amino acid L-cystine contains above-average concentrations of organic pollutants and significant concentrations of nitrogen and sulfur. The specific biogas production (SBP) of waste biomass was monitored in parallel suspended-growth laboratory anaerobic bioreactors. After severe inhibition was observed, three different procedures were applied to inhibited reactor sludge to counter-attack the inhibitory effects of sulfides, respectively hydrogen sulfide: micro-aeration, dilution with water and precipitation by ferrous iron cations. The performance of bioreactors was weekly monitored. Organic loading rates (as chemical oxygen demand, COD) ranged from 1.07 to 1.97 g L\u22121 d\u22121. At the end of the experimentation, SBP averaged 217, 300 and 320 l kg\u22121 COD with a methane content of 21%, 52% and 54%; specific sludge production averaged 133, 111 and 400 g total solids kg\u22121 COD, and inhibition was 49%, 27% and 25%; for the applied procedures of micro-aeration, dilution and precipitation respectively.<\/jats:p>","DOI":"10.2166\/wst.2015.224","type":"journal-article","created":{"date-parts":[[2015,8,6]],"date-time":"2015-08-06T12:59:13Z","timestamp":1438865953000},"page":"585-592","update-policy":"https:\/\/doi.org\/10.2166\/iwapcrossmarkpolicypage","source":"Crossref","is-referenced-by-count":3,"title":["Anaerobic digestion of waste biomass from the production of L-cystine in suspended-growth bioreactors"],"prefix":"10.2166","volume":"72","author":[{"given":"Juan Jos\u00e9","family":"Ch\u00e1vez-Fuentes","sequence":"first","affiliation":[{"name":"Department of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Institute of 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